Because of a server test to make sure we can still keep the wikis alive if a catastrophe happens, you won't be able to edit the wikis for up to an hour on 10 October. You can read more.

Куарусён 2018

September 12:

Because of a server test to make sure we can still keep the wikis alive if a catastrophe happens, you can't edit the wikis for up to an hour on 12 September. You can read more.

Пӧсьтолэзь 2018

July 23:

Editing of sitewide CSS/JS will soon be restricted to a new user group, to improve the security of MediaWiki and the Wikimedia projects. The new group will be managed by the local communities, who need to set up the appropriate policy. To find out more and give feedback, see Creation of separate user group for editing sitewide CSS/JS.